waking up from zzz(8)

[Mikhail Teterin]

My Vaio laptop (5.2-current from April 7) duly goes to a quiet sleep
when I type `zzz'.

Trouble is, I don't know, how to recover from that. If I hit a keyboard
key, there is some activity inside, but the screen never turns on and
rebooting seems to be my only option.

The laptop has ACPI, so, I gather, zzz uses acpiconf. Here are all of
the acpi-containing strings from dmesg:

Preloaded elf module "/boot/vaio/acpi.ko" at 0xc08192a0.
  Features=0xa7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>
acpi0: <SONY> on motherboard
acpi0: [GIANT-LOCKED]
AcpiOsDerivePciId: bus 2 dev 5 func 0
AcpiOsDerivePciId: bus 0 dev 31 func 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 3, width = 0
ACPI timer looks GOOD min = 3, max = 4, width = 1
ACPI timer looks GOOD min = 3, max = 3, width = 0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
AcpiOsDerivePciId: bus 0 dev 0 func 0
AcpiOsDerivePciId: bus 0 dev 0 func 1
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_tz0: <Thermal Zone> on acpi0
acpi_lid0: <Control Method Lid Switch> on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib1
acpi_ec0: <Embedded Controller: GPE 0x1c> port 0x66,0x62 on acpi0
acpi_ec0: info: new max delay is 3 us
acpi_ec0: info: new max delay is 9 us
acpi_ec0: info: new max delay is 10 us
acpi_ec0: info: new max delay is 20 us
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
psmcpnp0 irq 12 on acpi0
acpi_cmbat0: <Control Method Battery> on acpi0
acpi_acad0: <AC Adapter> on acpi0
acpi_cpu0: set speed to 100.0%
acpi_cpu: throttling enabled, 8 steps (100% to 12.5%), currently 100.0%
acpi_cmbat0: battery initialization start
acpi_ec0: info: new max delay is 65 us
acpi_cmbat0: battery initialization done, tried 1 times
acpi_acad0: acline initialization start
acpi_acad0: Off Line
acpi_ec0: info: new max delay is 70 us
acpi_ec0: info: new max delay is 107 us
acpi_acad0: acline initialization done, tried 7 times
acpi_ec0: info: new max delay is 395 us

Thanks for hints! Yours,

	-mi